Investment Securities (Tables)

9 Months Ended

Sep. 30, 2018

Investment Securities [Abstract]

Schedule Of Investment Securities Classified As Available-for-sale And Held-to-maturity

Available-for-sale	September 30, 2018
		Gross	Gross
	Amortized	unrealized	unrealized	Fair
	cost	gains	losses	value
U.S. Government agency securities	$               55,807	$                      -	$             (1,844)	$              53,963
Asset-backed securities *	205,823	577	(172)	206,228
Tax-exempt obligations of states and political subdivisions	8,145	19	(78)	8,086
Taxable obligations of states and political subdivisions	60,688	674	(1,542)	59,820
Residential mortgage-backed securities	392,722	587	(12,820)	380,489
Collateralized mortgage obligation securities	274,481	109	(8,141)	266,449
Commercial mortgage-backed securities	305,384	461	(6,463)	299,382
	$          1,303,050	$               2,427	$           (31,060)	$         1,274,417

	September 30, 2018
		Gross	Gross
	Amortized	unrealized	unrealized	Fair
* Asset-backed securities as shown above	cost	gains	losses	value
Federally insured student loan securities	$               74,989	$                  325	$                (171)	$              75,143
Collateralized loan obligation securities	125,044	231	(1)	125,274
Other	5,790	21	-	5,811
	$             205,823	$                  577	$                (172)	$            206,228

Held-to-maturity	September 30, 2018
		Gross	Gross
	Amortized	unrealized	unrealized	Fair
	cost	gains	losses	value
Other debt securities - single issuers	$                 9,155	$                      -	$             (1,767)	$                7,388
Other debt securities - pooled	75,278	1,085	-	76,363
	$               84,433	$               1,085	$             (1,767)	$              83,751

Available-for-sale	December 31, 2017
		Gross	Gross
	Amortized	unrealized	unrealized	Fair
	cost	gains	losses	value
U.S. Government agency securities	$               50,107	$                    21	$                (226)	$              49,902
Asset-backed securities *	269,164	1,196	(275)	270,085
Tax-exempt obligations of states and political subdivisions	9,893	131	(36)	9,988
Taxable obligations of states and political subdivisions	64,739	1,377	(255)	65,861
Residential mortgage-backed securities	452,723	727	(4,598)	448,852
Collateralized mortgage obligation securities	248,663	148	(2,318)	246,493
Commercial mortgage-backed securities	204,469	585	(1,751)	203,303
	$          1,299,758	$               4,185	$             (9,459)	$         1,294,484

	December 31, 2017
		Gross	Gross
	Amortized	unrealized	unrealized	Fair
* Asset-backed securities as shown above	cost	gains	losses	value
Federally insured student loan securities	$               90,140	$                  271	$                (270)	$              90,141
Collateralized loan obligation securities	170,825	880	(5)	171,700
Other	8,199	45	-	8,244
	$             269,164	$               1,196	$                (275)	$            270,085

Held-to-maturity	December 31, 2017
		Gross	Gross
	Amortized	unrealized	unrealized	Fair
	cost	gains	losses	value
Other debt securities - single issuers	$               11,031	$                  105	$             (2,516)	$                8,620
Other debt securities - pooled	75,349	1,376	-	76,725
	$               86,380	$               1,481	$             (2,516)	$              85,345

Amortized Cost And Fair Value Of Investment Securities By Contractual Maturity

	Available-for-sale		Held-to-maturity
	Amortized	Fair	Amortized	Fair
	cost	value	cost	value
Due before one year	$                 2,367	$                2,360	$                       -	$                      -
Due after one year through five years	54,439	54,034	-	-
Due after five years through ten years	277,018	267,347	-	-
Due after ten years	969,226	950,676	84,433	83,751
	$          1,303,050	$         1,274,417	$              84,433	$            83,751

Available-for-sale And Held-to-maturity Securities, Continuous Unrealized Loss Position

Available-for-sale		Less than 12 months		12 months or longer		Total
	Number of securities	Fair Value	Unrealized losses	Fair Value	Unrealized losses	Fair Value	Unrealized losses
Description of Securities
U.S. Government agency securities	12	$              40,756	$              (1,271)	$              13,112	$                 (573)	$                 53,868	$             (1,844)
Asset-backed securities	8	16,476	(8)	24,305	(164)	40,781	(172)
Tax-exempt obligations of states and
political subdivisions	5	1,391	(6)	3,597	(72)	4,988	(78)
Taxable obligations of states and
political subdivisions	28	31,462	(930)	12,671	(612)	44,133	(1,542)
Residential mortgage-backed securities	121	115,119	(2,189)	218,233	(10,631)	333,352	(12,820)
Collateralized mortgage obligation securities	47	144,686	(4,199)	89,045	(3,942)	233,731	(8,141)
Commercial mortgage-backed securities	26	190,644	(5,460)	31,634	(1,003)	222,278	(6,463)
Total temporarily impaired
investment securities	247	$            540,534	$            (14,063)	$            392,597	$            (16,997)	$               933,131	$           (31,060)

Held-to-maturity		Less than 12 months		12 months or longer		Total
	Number of securities	Fair Value	Unrealized losses	Fair Value	Unrealized losses	Fair Value	Unrealized losses
Description of Securities
Corporate and other debt securities:
Single issuers	1	$                      -	$                      -	$                7,388	$             (1,767)	$                  7,388	$             (1,767)
Total temporarily impaired
investment securities	1	$                      -	$                      -	$                7,388	$             (1,767)	$                  7,388	$             (1,767)

The table below indicates the length of time individual securities had been in a continuous unrealized loss position at December 31, 2017 (dollars in thousands):

Available-for-sale		Less than 12 months		12 months or longer		Total
	Number of securities	Fair Value	Unrealized losses	Fair Value	Unrealized losses	Fair Value	Unrealized losses
Description of Securities
U.S. Government agency securities	9	$              44,808	$                 (226)	$                      -	$                       -	$                 44,808	$                (226)
Asset-backed securities	8	11,264	(6)	37,894	(269)	49,158	(275)
Tax-exempt obligations of states and
political subdivisions	5	3,982	(19)	1,143	(17)	5,125	(36)
Taxable obligations of states and
political subdivisions	15	22,231	(181)	2,853	(74)	25,084	(255)
Residential mortgage-backed securities	116	249,572	(1,771)	125,096	(2,827)	374,668	(4,598)
Collateralized mortgage obligation securities	41	148,655	(921)	63,274	(1,397)	211,929	(2,318)
Commercial mortgage-backed securities	16	150,530	(1,681)	3,299	(70)	153,829	(1,751)
Total temporarily impaired
investment securities	210	$            631,042	$              (4,805)	$          233,559	$              (4,654)	$               864,601	$             (9,459)

Held-to-maturity		Less than 12 months		12 months or longer		Total
	Number of securities	Fair Value	Unrealized losses	Fair Value	Unrealized losses	Fair Value	Unrealized losses
Description of Securities
Corporate and other debt securities:
Single issuers	1	$                      -	$                      -	$                6,600	$             (2,516)	$                  6,600	$             (2,516)
Total temporarily impaired
investment securities	1	$                      -	$                      -	$                6,600	$             (2,516)	$                  6,600	$             (2,516)

Schedule Of Additional Information Related To Single Issuer And Pooled Trust Preferred Securities

Single issuer	Book value	Fair value	Unrealized gain/(loss)	Credit rating
Security A	9,155	7,388	(1,767)	Not rated